Modern warfare is founded on networks and tactical cyber and electromagnetic activities (CEMA) provide critical keyholes to unlocking their cognitive spaces. Over the last 16 years, advances in regional adversary technical capabilities have eroded the U.S. military’s multi-domain superiority and now pose sophisticated challenges that require the re-examination of all assumptions. But more difficult doesn’t mean unwinnable. Recent U.S. Army CEMA initiatives promise to be indispensable new means for commanders to gain tactical advantage, not just in the physical sense, but in the cognitive as well. Spurred by the recent U.S. Army and Marine Corps concept of multi-domain battle,[2] this paper advances the notion of ‘window-chaining’ as a new cognitive term of art to help visualize its “temporary windows of advantage”[3] and use CEMA as the means to arrange their multi-simulta...